Abstract

The cooling processes in the system of are analyzed with a self-consistent calculation based on the model of optothermionic refrigeration. The refrigeration heat as several is obtained theoretically with the optimal parameters of the aluminum atom fraction and the doping density for the system. Due to the small Auger coefficient and the lower carriers’ density in the well, the Auger dissipation heat in the present system is smaller than that in the system of . Furthermore, the applied bias range for obtaining high cooling heat in the present system is calculated to be larger than that in the system of . For obtaining larger cooling heat, a double-well system of is designed, in which the maximum cooling heat is predicted as about higher than that in a single-well system of .

Received 16 August 2006Accepted 22 October 2006Published online 10 January 2007

Acknowledgments:

The authors would like to thank Dr. Qing-Li Zhou and Dr. Dong-Yi Guan for their helpful discussions. This work is supported by a grant from the National Natural Science Foundation of China (No. 60321003).